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Zip up and down

  1. Aug 19, 2007 #1
    What localities have the highest and lowest Zip Codes?
  2. jcsd
  3. Aug 19, 2007 #2


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    According to wikipedia
    The lowest ZIP code is in Holtsville, New York (00501, a ZIP Code exclusively for the U.S. Internal Revenue Service center there)
    The highest ZIP Code is in Ketchikan, Alaska, 99950 for post office boxes
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